Maintenance Release

Important: There is a bug in this release hat potentially causes unresponsiveness of the flight controller on power up. If you experience this on your flight controller, please update to 4.2.8 to fix the issue.

Please read the Betaflight 4.2 Release Notes.

This release contains bugfixes and target changes only. For a full list of new features see 4.2.0.

We have tried to make this release as bug free as possible. If you still find a bug, please report it back to us by opening an issue here.

If you want to talk about Betaflight, ask configuration questions, or just hang out with fellow pilots, you can do this in our Facebook group.

Betaflight also has a presence in the Slack messaging platform. Register here, and then come join us in Slack. Most developers hang out there, so this is a great place to talk about the things you are tinkering with in Betaflight, or get help with really complicated configuration problems.

Safety Improvements:

• fixed bugs in the use of baro_sample_count causing potential runaway ascent (#10472, #10481).

Fixes:

• fixed missing BLHeli32 hardware version (#10290);
• fixed compiler warning when building the SITL target (#10363);
• fixed problem causing high error rates with bidirectional Dshot on H7 (#10383);
• fixed problem of getting stuck in the CMS menu when invoking multiple times with SRXL and CRSF (#10448);
• fixed compilation errors in the AK8975 magnetometer driver (#10464, #10477);
• fixed bug causing a lockup when setting ibata_scale to 0 (#10471);
• fixed validation for minimum and maximum cell voltage (#10473);
• fixed bug in displayport code leading to the potential for UART1 to be flooded with OSD messages (#10489, #10490).

Target Updates:

• added more features to target IFLIGHT_H743_AIO(#10451);
• added the AK8975 magnetometer driver to the Unified Targets (#10468).